Microelectrochemical Investigation of Pit Initiation and Selective Dissolution between MnS and Stainless Steel
Microelectrochemical Investigation of Pit Initiation and Selective Dissolution between MnS and Stainless Steel
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DOI：
10.1149/05047.0015ecst
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
A. Chiba;I. Muto;Y. Sugawara;N. Hara
中科院分区：
文献类型：
--
作者：
A. Chiba;I. Muto;Y. Sugawara;N. Hara
不锈钢在含氯化物的环境中容易发生点蚀。在我们之前的研究中，通过原位光学显微镜观察，1,2证明了在NaCl溶液中MnS夹杂物与钢基体之间的边界处产生凹坑。除此之外，在点蚀之前最重要的现象是由边界的选择性溶解引入的沟槽形成。在研究坑的起裂机理时，分析边界处的选择性溶解是很重要的。
Stainless steels suffer from pitting corrosion in chloride-containing environments. In our previous studies through the in situ optical microscopic observations, 1,2 it was demonstrated that pits were initiated at the boundaries between the MnS inclusions and the steel matrix in NaCl solutions. In addition to this, the most significant phenomenon which precedes pitting is the trench formation, which was introduced by selective dissolution at the boundaries. In addressing the pit initiation mechanisms, it is important to analyze the selective dissolution at the boundaries.